A MERICA N PARASITIC ARG ULIDJ^ WILSON. 733 



pace, as wide as deep. Abdomen broad elliptical, one-third the length 

 of the rest of the bod}', as wide as long; anal sinus narrow, extending 

 about one-third the length of the abdomen. Anterior maxillipeds 

 long, stout, many jointed; posterior ones slender; basal plate very 

 Avide, teeth blunt and far apart, nuich resembling those of A. catos- 

 tomi and A. americanus. 



Antenna^ as in longicauda. Swimming legs not reaching the edge of 

 the carapace; flagella on the two anterior pairs; lobes on the posterior 

 pair long, narrow, well rounded. 



Teeth on the ventral surface of the carapace roughly arranged in 

 transverse rows, those in the area between the antenna^ nmch larger 

 than along the margin. Color a grayish white, without the liands of 

 pigment seen in longicauda. 



Length, 12 mm.; length of carapace, lU mm.; l)rcadth of carapace, 

 9 mm. ; length of abdomen, 3 mm. ; width, 3 mm. Heller's figure, 

 contains a pair of three- lobed testes in the abdomen, and therefore 

 ought tt) be a male, contrary to the statement given by Thorell, 

 although the posterior legs do not show any copulatory organs. 

 Bouvier, in his thorough review of the species, does not even mention 

 this fact. But he did examine Heller's type specimen, and distinctly 

 states that only females are known. 



IFahitdt. — In Brazil, host unknown, {kollm'i — to Vincenz Kollar, 

 director of the museum from which Heller obtained his specimens.) 



DOLOPS DORADIS Cornalia. 



I'late XXV, fig 75. 



Gijropclth fJnrnd!.'< Cornalia, 1860. 

 GyropcJlis <lnrn,l,.s Thorell, 1864. 

 Dotop.s (/u/(('/(V Bouvier, 1899. 



Carapace orbicular, a little wider than long; posterior sinus two- 

 fifths the length of the carapace, wide and well rounded at the base, 

 but the sides approach posteriori}^ until the lobes almost touch each 

 other. Abdomen long and narrow, one-half the length of the rest of 

 the body; anal sinus narrow, cut clear to the base, leaving very nar- 

 row acuminate lo])es. 



Anterior maxillipeds ver}^ wide at the base and so short as to have 

 almost the outline of an equilateral triangle; posterior maxillipeds 

 much longer; ])asal plate wide, with regidar saw teeth close together. 

 Antennte long and slender; the first pair have no hook upon the 

 anterior margin, but the lateral hooks are much longer than in other 

 species and strongly curved. 



Swimming legs reach a trifie beyond the edge of the carapace; the 

 three anterior pairs furnished with flagella; lobes on the two basipod 

 joints of the posterior pair large and broad. 



Papillaj connected with the semen receptacles in the abdomen of the 



